AutomationDirect has added more low-cost ProSense float level switches. The new offering includes the FLS-VM-800 float switch which has a 3/4" PVC pipe fitting for use in HVAC condensate lines, and ...

They use a buoyant float to gauge a fluid level. In most models, the float carries permanent magnets and encircles a stationary stem. As the float rises or drops with fluid level, the magnetic field ...